package Tree_;

import java.util.LinkedList;
import java.util.Queue;
import java.util.Scanner;

/*
 *@Student 张策
 */

public class Main {
//    public static void main(String[] args) {
//        BinaryTree binaryTree = new BinaryTree();
//        BinaryTree.TreeNode root = binaryTree.createTree();
//        BinaryTree.TreeNode root2 = binaryTree.createTree();
//        BinaryTree.TreeNode e = binaryTree.find(root, 'E');
//        System.out.println(e.val);
//        System.out.println(binaryTree.isSameTree(root2, root));
//    }
public static void main(String[] args) {
    Queue<Character> queue = new LinkedList<>();
    queue.offer(null);
    System.out.println(queue.isEmpty());
}
}